Researchers from China have developed a prototype flexible armband that works as a programmable input device, like a touchpad or keyboard.

To achieve this they sandwiched a pressure-sensitive hydrogel between layers of knit silk, with the top piece being coated in graphene nanosheets to make the fabric electrically conductive.

This could potentially be an interesting way to interact with systems, especially in virtual or augmented reality. Imagine mixing this with the shapeshifting tactile system I covered earlier and you could have dynamically changeable interfaces for different applications.

https://acs.org/pressroom/presspacs/2023/may/touch-responsive-fabric-armband-for-flexible-keyboards-wearable-sketchpads.html
https://pubs.acs.org/doi/abs/10.1021/acsnano.2c12612
https://www.youtube.com/watch?v=Uqsme89hSJU